Answer:
-48m + 126
Explanation:
9(-8m + 10) + 4(6m + 9)
use distributive property
9(-8m + 10)
=
-72m + 90
and
4(6m + 9)
=
24m + 36
-72 + 36 + 90 + 36
combine like terms
(-72m + 36) + (90+36)
=
-48m + 126
Your answer is
-48m + 126
unless you're asking what m is. It's -2.623 (decimal form) , -21/8 (exact form) , -2 5/8 (mixed number)